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2019 Central Zone Culvert/Bridge Replacement CE Site Locations

Selway Drainage: O’Hara Bridge

The current bridge was constructed with a central pier that alters flow and potentially traps debris moving down stream. The proposed design replaces it with a full spanning bridge with no center pier. This is a potential partnership project with the Nez Perce Tribe.

Middle Fork Clearwater River Drainage: 

The Big Smith culvert lies under US Hwy 12 and is significantly undersized. Designs are currently being developed and it will likely be replaced with a much larger arch pipe or possible bottomless arch. Because of the length (200’), and the retention of private access to the private property on either side of it, a bridge is likely unfeasible. This is in partnership with Idaho Transportation Dept. and the Nez Perce Tribe.

Pine Knob is currently a bridge that is not suitable for haul based on its current condition. It will be replaced with a 12’ span arch pipe which, at a minimum, meets the 100 year flow event. 

Lolo Creek Drainage:

All culverts would be replaced with culverts that are designed meet, at a minimum, a 100-year flow event. These replacements are potential partnership projects with the Nez Perce Tribe.